<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>字符实体</title>
</head>
<body>
<h1>字符实体</h1>
<h2>空格</h2>
<p>空格&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;空格</p>
<h2>小于号</h2>
<p>小于号&lt;小于号</p>
<h2>大于号</h2>
<p>大于号&gt;大于号</p>
</body>
</html>
